com.sleepycat.je.util

Class DbTruncateLog

java.lang.Object

com.sleepycat.je.util.DbTruncateLog

public class DbTruncateLog
extends Object

DbTruncateLog is a utility that lets the user truncate JE log starting at a specified file and offset to the last log file, inclusive. Generally used in replication systems for handling com.sleepycat.je.rep.RollbackProhibitedException, to permit the application to interject application specific handling. Should be used with caution.

The parameters for DbTruncateLog are provided through the RollbackProhibitedException instance, and the exception message. The goal is to truncate the JE log after a specified file number and file offset. DbTruncateLog will automatically delete all log entries after that specified log entry.

For example, suppose the JE log consists of these files:

    00000002.jdb
    0000000e.jdb
    0000000f.jdb
    00000010.jdb
    00000012.jdb
    0000001d.jdb
    0000001e.jdb
    0000001f.jdb
 

And the log must be truncated at file 0x1d, offset 0x34567, users should use the following command:

1. DbTruncateLog -h <envDir> -f 0x1d -o 0x34567

Constructor Summary

Constructors

Constructor and Description
DbTruncateLog()

Method Summary

Modifier and Type	Method and Description
static void	main(String[] argv) Usage:
void	truncateLog(File env, long truncFileNum, long truncOffset)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DbTruncateLog

public DbTruncateLog()

Method Detail

main

public static void main(String[] argv)

Usage:

  -h environmentDirectory
  -f file number. If hex, prefix with "0x"
  -o file offset byte. If hex, prefix with "0x"
 

For example, to truncate a log to file 0xa, offset 0x1223:

 DbTruncateLog -h <environmentDir> -f 0xa -o 0x1223
 

truncateLog

public void truncateLog(File env,
                        long truncFileNum,
                        long truncOffset)
                 throws IOException

Throws:

IOException